simulink subsystem connection error

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need help with simulink. i am building a transfer function with a subsystem. i am using a four quadrant 2 pole switching . when i put it in my main transfer function. i am recieving a error of input 1 is not connected. i am not sure where to connect this . please help. i have uploaded the error. also a picture of the subsystem. and the actual transfer function.

    • 9 years ago
    • 4
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